Demonstrative evidence helps the factfinder understand testimony or other evidence. Common forms include medical illustrations, scene diagrams, accident animations, timelines, and enlarged document excerpts.
It is generally distinguished from substantive evidence: the exhibit illustrates what a witness says rather than proving the underlying fact independently, and courts differ on whether it goes to the jury room.
Alternative Names:
Demonstrative Exhibit, Illustrative Evidence
Why it Matters?
Demonstratives frequently carry more persuasive weight than the testimony they illustrate, particularly medical animations in injury cases. That influence is why they draw substantial pretrial challenge, focused on whether the depiction accurately reflects the underlying evidence or subtly overstates it. Both sides should demand early disclosure so objections can be resolved before the jury sees the material.
Frequently Confused with
Related terms
Frequently asked questions
Does demonstrative evidence go to the jury room?
What is the usual objection to an animation?
